def dayUp(df):
    dayup = 1.0
    for i in range(365):
        if i % 7 in [6, 0]:
            dayup = dayup * (1 - 0.01)
        else:
            dayup = dayup * (1 + df)
    return dayup
dayfactor = 0.01
while (dayUp(dayfactor) < 37.78):
    dayfactor += 0.001
print("每天努力的参数是:{:.3f}。".format(dayfactor))
